Improvement in shingle-machines



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Ji? I gzizejses f77/venan' df@ M NITED STATES VILLIAM H. WALKER, OF FOND DULAG, IVISCON SIN IMPROVEMENT IN sHlNGLE-MACHINES.

Specication forming part of Letters Patent No. 76,566, dated April 7, 1368.

To all whom it may concer/1,:

Be it known that I, -WM. H. WALKER, of Fond du Lac, in the county of Fond du Lac and State of Visconsin, have invented certain new and useful Improvements in Shingle-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked. thereon,like letters indicating like parts wherever they occur.

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

My invention consists in certain improvements in the construction of machines for sawing shingles, the details of which will be hereinafter explained, and which relates, first, to the method of operating the saw-carriage; second, the means of operating the dogs that hold the teeth; third, a device for raising the blocks free from the saw after a shingle is cut off 5 fourth, arranging the tip-tables upon the sawcarriage, together with certain details hereinafter more fully specified.

Figure l is an end elevation of my improved machine; Fig. 2, a top plan view, and Fig. 3 a transverse section taken on the line x x of Fig. l.

In constructing my improved machine I first provide a suitable main frame, A, having a top frame, B, of metal or other suitable material, secured on its top, as represented in Figs. l and 2. Vithin this main frame is iitted a movable frame, L, in which is mounted a circular saw, G, said saw being mounted horizontally on the upper end of a shaft, c, upon which is secured a pulley, E, the shaft being located centrally in the frame L, and of such a height as to bring the saw close under the top frame, B, as shown in Fig. l.

Directly under the movable carriage L, and in the center of the main frame A, I locate a large gear-wheel, G, horizontally on a vertical axis, j', said wheel being driven by a smaller wheel, H, mounted on a vertical shaft, I, located near one corner of the frame, and having driving-pulleys .I secured thereon, there being a sliding clutch, d, on the shaft I, operated by a foot-lever, g, for disengaging the pulley J ,when itis desired to stop the motion of the saw-carriage, these parts being more fully shown in Figs. l and 3. n

Upon the upper side of the gear-wheel G, I secure an eccentric or cam, m, as represented in Fig. 3, and at the opposite ends of the central bar, L, of the saw-carriage L (shown in red outlines in Fig. 3 in the position it occupies above the wheel G) I locate a friction-roller, z', which projects downward far enough to be in the same horizontal plane as the cam m, as shown in Fig. l, so that as the cam m revolves with the wheel G the cam m will strike or press against one of the friction-rollers i, and thus crowd the carriage L, with its saw, over to one end of the machine, and then, as it comes around to the opposite side, will press against the other roller z', and thus drive the carriage back to that end ofthe machine, the cam m being so apportioned to the position of the rollers i that, as soon as the outer vextremity of the cam shall have passed one roller, its inner portion shall press against the other roller, and thus keep the carriage constantly moving back and forth. By giving to the cam m the requisite form the saw may have imparted to it either a regular or irregular feed, as may be desired. It may be arranged to cut with a regular feed through the entire block, or it may be made to feed faster during the iirst part of its cut and then decrease, either with a regular or irregular speed, or vice versa. y

In order to insure the easy and accurate movement of the carriage with its saw, I pro` vide metal bars b for the carriage to run on, said bars being secured upon horizontal beams VK, as shown in Figs. l and 3. These bars have their inner edges provided with a V-shaped ledge, inverted and projecting vertically, on which run rollers e, having a corresponding groove in their face, these rollers being secured to each end of an axle, F, placed transversely across the bottom of the carriage L, asshown in Fig. l, there being one of these axles at each end of the carriage.

In order to keep the track clean vand free from particles of saw-dust and similar material, I secure on the lower corners of the carriage, at each end, a piece of leather, rubber, or other iiexible material (represented by r in Fig. l) in such a position that as the carriage moves along it will rest upon and brush oft from the ways or bars b any dust or material that may chance fo be thereon.

On each side of the carriage L, at the top, is secured a metal plate, w, and on the upper side beams of the main frame is secured, on

` each side of the machine, a metal plate, o, by

means of set-screws passing through slots therein, the plates o being placed horizontally,

and having their inner edges projecting in-I ported or hinged on the rod 7c, and their inner4 sides resting on a cross-bar, It, of the frame B, as shown in Fig. 1. At one end the frames D are provided with a stationary `dog for holding the bolt, while at Vthe opposite end they are provided with a movable dog, p, which has an arm extending outward over the side `of the machine, as shown in Fig. 1, and resting on a fixed arm, V, which projects from the -side of the frame D, there being a slot, o', in the outer portion of the fixed 'arm V, in which the upper end of a vertical rod, b', works to and fro, to operate the dog p and cause it to secure and release the bolt at proper times.

The means for operatingthe dog p are-shown in Fig. 1, and consist, first, of a cam, P, a tached toand projecting vertically `from the under face of the wheelG; second, of a pivoted rod, a, having its inner end provided with a friction-roller, t, so located as to be depressed by the cam P as the latter rotates, and having its outer endpivoted to a vertical rod, fu, tothe upper end of which is a plate, N, bent so as to embrace a pair of stationary guide-rods, a', and the rod b', which latter is placed between the bars a', there being a friction-roller, c', secured in the sliding box N on opposite edges ofthe rods a', as shown clearly in Fig. 1. The upper portion of the rod b is inclined, as shown in Fig. 1, and as the box or plate N is slid upon `the guide-rods a, by the cam P striking against the lever a, as already described, the upper portion of rrod b is thrown outward, and thereby moves the dog p outward, releasing the bolt,-which then falls upon the tilting table O, pivoted upon the end of the saw-carriage L, as shown in Fig. 1. As soon as the cam P has passed overthefrictionroller t the box N slides down, and as it does so it forces the rod b inward, and thereby forces the dog p into the end of the block, and holds it secure until the shingle is sawed off. Thus at each revolution of the wheel G the cam p dogs and undogs a block in each of the frames D. The tilting tables O are `placed on the opposite ends of the saw-carriage L, being pivoted at their center on a rod or bolt, Z, and are tilted by cams y on opposite ends of a shaft operated by a pawl, this latter part being common in machin es of this kind, andhence not necessary t0 describe in detail.

Upon the top frame, B, I pivota bifurcated lever, T, as shown in Fig. 2. This lever has an arm projecting under the inner edge of each frame D, the arm terminating at its extremity in aright-angled point, c,which is made wedgevdulled, heated, or worn.

The permanent dog f consists of a metal plate having its inner edge made sharp to enter `the end of the block. This plate f is secured to the inner face of a wooden block or bar, Z, which is bolted or otherwise secured in the end of the frame D, as shown in Fig. 2.

By detaching .the blocks Z others may be substituted at any time, and by using blocks Z of different thicknesses the size of the openings in frames D may be adjusted to suitblocks of different lengths, as may be desired.

By these various improvements I am enabled to produce a machinethat performs its workin a very rapid and satisfactory lnanner.

Having thus vdescribed my invention, what I claim is- 1. Thecombination of the wheel G, provided with the cani m, and the sliding carriage provided with the friction-rollers i, or equivalents, all constructed and arranged to .operate substantially as described.

2. Operating the dogs p by means of theinclined bar b, sliding box N, and lever a, op. erated by cam I, substantially as set forth.

3. `The forked lever T, pivoted upon the main frame A, and arranged to be operated by the carriage L for the purpose of raising the blocks from contact with the saw, substantially as described.

4. Locating and carrying the tip-tables O, with the cam-shafts, on the saw-carriage L, substantially as shown and described.

5. The metal dogs f', secured to the wooden head-blocks Z, when arranged in the metal frames D, as set forth.

In witness whereof I have hereunto set my hand.

\VM. H. WALKER.

YVitnesses:

O. DODGE, ANDREW SMITH. 

